Bug 2513088

Summary:	CVE-2026-59087 gimp: Heap buffer overflow in `file-seattle-filmworks` load — `fread` writes attacker-controlled length into undersized allocation [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	gimp	Assignee:	Nils Philippsen <nphilipp>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	45	CC:	jridky, nphilipp, phracek, zdohnal
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---	Flags:	fedora-admin-xmlrpc: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["389f5442-f813-473d-bff6-5261a1b566c2"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2496576

Description Ganesh 2026-08-10 10:40:19 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The Seattle Filmworks file loader reads two file-position-derived values, index and metadata_len[1], uses only metadata_len[1] to size the allocation for photo_date, then freads index - metadata_len[1] bytes into it. Both values are attacker-controlled and independent. When index ≫ metadata_len[1], the read overflows the heap by up to several KB of attacker-controlled bytes.
In a build with _FORTIFY_SOURCE (Ubuntu default), glibc detects this at runtime and aborts. In a non-FORTIFY build the corruption is silent.

Issue Link: https://gitlab.gnome.org/GNOME/gimp/-/work_items/16491

Comment 1 Aoife Moloney 2026-08-17 15:50:19 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.